Hoisting apparatus.



N0 MODEL.

. PATBNTED- JUNE 2, 190s.

c. W. HUNT.

`HOISTING: APPARATUS.

APPLICATION FILED FEB. 2.0. 190.2.

` 2`SHIABTS--SHEET 1- HGISTING-APPARATUS.

AnnroATlon FILED rms. 2o. 1902. no nonm.. 9

PATENTED JUNE 2, 1903.

2 SHEETS-SHEET 2.

UNITED STATES Patented .rune 2, 1903.

g PATENT OFFICE.

HolsTiNe APPARATUS.

SPECIFICATION forming' part of Letters Patent No. 729,867, dated June 2, 1903.

Application Bled February 20, 1902. Serial No. 94,812. (No model.)

To all whom t may oon/cern:

Be it known that I, CHARLES WALLACE HUNT, a citizen of the United States, residing in West New Brighton, borough of Richmond, city of New York, State of New York, have invented certain new and useful Improvements in Hoisting Apparatus, of which the follow` ing is a specification, reference being had to the accompanying drawings, forming a part hereof.

This invention relates to hoisting 'apparatus of the general character of that shown in Letters Patent of the UnitedStates No. 622,366-, dated April 4, 1899, in which the load is not only raised or lowered, butis translated in a substantially horizontal plane.

The object of the invention is to improve the construction and arrangement of such ap paratus, so as to facilitate the operationthereof, to reduce the work to be performed by the hoisting engine or motor, and particularly to relieve the stresses on the mechanism` by which the hoisting-drums are driven.

The invention will be more fully described hereinafter with reference to the accompanying drawings, in which for the purposes of explanation it is represented as embodied in a suitable structure, and in which- Figure l is a View, partly in elevation and partly in outline, of so much of a complete structure as is necessary to enable the inveni tion to be understood. Fig. 2 is a plan view illustrating a different arrangement of driving mechanism for the drums. Fig. 3 is a detail View illustrating a form of brake which may be applied to one of the drums. Fig. 4. is a View, partly in `longitudinal section, of one of the drums, illustrating a formof clutch which may be employed for driving the drum. Fig. 5 is an end elevation illustrating the means for controlling the clutch shown in Fig. 4. Fig. 6 is a detail view illustrating the connection of the outhaul-rope to the trolley over a sheave carried on the trolley-frame.

In the structure represented in the drawings two drums d and Z9 for raising and lowering the load and for effectingthe horizontal translation thereof,` respectively, are preferably mounted upon a common shaft c. `The drum a may bc fixed on the shaft and may be provided with a gear d,`throu'gh which it may be driven, with the shaft, from a motor e of any suitable character. The drum a may also be provided with a brake f, which need notbe further described herein. The drum b is loose on the shaft c and may be engaged therewith through a friction-clutch g, one member of which is fast on the shaft c. In the construction shown the drum b is arranged to be moved into or out of engagement with the fast clutch member through suitable operating devices, which may comprise a collar h, engaging the hub of the drum, screws t', threaded into said collar, and

arms 7c, which may be connected with each other and with the controlling-lever by suitable links. A brake Z is also applied to the drum ZJ and may be controlled byrany suitable devices not necessary to be described.

The hoisting-rope fm, which is connected to the drum a, passes over a suitable guidesheave m' and'thence to the trolley-frame fn, as shown in Fig. l, or over a sheave m2 on the trolley-frame fn, the latter being arranged to travel, as usual, on a suitable track or way o. The free end of the hoisting-rope 'm is connected to the load in any suitable manner. The rope 19 for eecting the trans` lation of the load is connected to the drum b and is wound thereon in the opposite direction' to that in which the hoisting-rope mis wound on the drum a if the drums are arranged to rotate in the same direction; `but if they are arranged in tandem or otherwise, so that they rotate in opposite directions, the

4ropes should be wound in the same direction.

ing over a sheave thereon to the load, as has been usual heretofore. The rope 1J may be attached directly to the trolley-frame, as shown in Fig. 1, or it may pass over a sheave carried on the trolley-frame and be attached to a iXed point, as `shown in Fig. 6, in which case the drum b should be twice as large as the drum d.

In the operation of the improved apparatus when the drum d is being rotatedtohoist the load the trolley n if prevented from running inward on the boom or track by the rope p from the drum b, the latter being at that time 'nected to the trolley-frame fn instead of passp I OO unclutched from the shaft c and being held from rotation by the brake Z, when the load has been hoisted to the desired height the brake Z on the drum b is released and at the same time the drum b is engaged with the shaft through the operation of the clutch g, so that both drums continue to rotate in the same direction. The rope 1J, being wound on the drum b in the opposite direction from the rope m on the drum a, (or in the same direction if the drums rotate oppositely,) the continued rotation of both drums together will cause the rope m to be paid out as fast as the rope 'm is wound on its drum, and the stress of the load acting on the trolley through the rope fm will cause the trolley to move inward, the load being held at the same height. When the trolley has reached the desired point, the load is discharged, or if it is desired to lower the load the drum Z) is unclutched from the shaft c and the brake Z is applied and the drum a is permitted to rotate backward under the control of the motor or the brake f, if it be employed. When the load is translated outward, the drum b is clutched to the shaft, and the shaft, with both drums thereon, is rotated backward. It will be obvious that during the translation of the load in either direction the stress tending to revolve the drum a in one direction is balanced by the stress tending to revolve the drum b in the opposite direction through the opposite winding of the ropes and that the two drums are therefore in balance, with a torsion stress on the driving-shaft. Under these conditions there is no stress on the gear-teeth between the motor and the drum-shaft except that needed to overcome the moving friction of the trolley, sheaves, and ropes.

It will be understood that the drums may be operated by any convenient means, an alternative arrangement of driving means being shown in Fig. 2, in which each drum is driven by a corresponding gear or friction wheel q or q', adapted to beengaged through a corresponding clutch t; or c' with a common driving-shaft s, so that either drum or both drums together can be coupled to the driving-shaft. In this arrangement the brake may be applied to the driving-gear, as att and t', respectively.

Other arrangements of driving mechanism and other changes in the details of construction and arrangement of the apparatus will readily suggest themselves, and it is therefore to be understood that the invention is not restricted to the particular construction and arrangement of parts shown in the drawings.

I claim as my inventionl. A hoisting apparatus comprising a trolley, a support therefor, a drum for raising and lowering the load, a drum for effecting translation of the load, a hoisting-rope passing from the first-named drum over the trolley to the load, a second rope passing from the second drum over an outer guide and connected to the trolley-frame, a single motor and means to couple either or both of said drums to said motor to rotate said drums separately or together, substantially as set forth.

2. A hoist-ing apparatus comprising a trolley, a support therefor, a drum for raising and lowering the load, a drum for effecting translation of the load, a hoisting-rope passing from the irst-named drum over the trolley to the load,a second rope passing from the second drum over an outer guide and connected to the trolley-frame, said ropes being wound in opposite directions around their respective drums, a single motor and means to couple either or both of said drums to said motor to rotate said drums separately or together, substantially as set forth.

3. A hoisting apparatus comprising a trolley, a support therefor, a drum for raising and lowering the load, a drum for effecting translation of the load, a hoisting-rope passing from the first-named drum over the trolley to the load, a second rope passing from the second drum over an outer guide and connected to the trolley-frame, a single motor to rotate the first-named drum, means to couple the second drum to the first-named drum to rotate therewith, and means to control the rotation of the second drum when it is not coupled to the first-named dru'm, substantially as set forth. p

4. A hoisting apparatus comprising a trolley, a support therefor, a drum for raising and lowering the load, a drum for effecting translation of the load, a hoisting-rope passing from the first-named drum over the trolley to the load, a second rope passing from the second drum over an outer guide and connected to the trolley-frame, said ropes being wound in opposite directions around their respective drums, a single motor to rotate the first-named drum, means to couple the second drum to the first-named drum to rotate therewith, and means to control the rotation of the second drum when it is not coupled to the first-named drum, substantially as set forth.

5. A hoisting apparatus comprising a trolley, a support therefor, a drum for raising and lowering the load, a drum for effecting translation of the load, a hoisting-rope passing from the first-named drum over the trolley to the load, a second rope passing from the second drum over an outer guide and connected to the trolley-frame, said ropes being wound in opposite directions around their respective drums, a single driving-shaft for said drums, a clutch to couple the second drum to the shaft to rotate that with the rstnamed drum, and a brake to control the rotation of the second drum, substantially as set forth.

6. A hoisting apparatus comprising a trolley, a support therefor, a drum for raising ICO IIO

and lowering the load, a drum for eecting translation of the load, a hoisting-rope passing from the first-named drum over the trolley to the load, a second rope passing from the second drum over an outer guide and connected to the trolley, said ropes being wound in opposite directions around their respective drums, a single driving-shaft upon which the first-named drum is xed and upon which the 1o second drum is loosely mounted, a clutch to couple the second drum to said slxaft, and a brake to `control the rotation of the second drum, substantially as set forth.

This specification signed and w1tnessed this 8th day of February, A. D. 1902.

CHARLES WALLACE HUNT.

In presence of ANTHONY N. JESBERA,

M. A. BRAYLEY. 

